Compressor



Dec. 18, 1928.

D. F. SMITH COMPRESSOR Filed Aug. 27,l 1927 3 'Sheets-Sheet 1 Anya.

,D. F. SMITH COMPRESSOR Filed Aug. 27, 1927 s sheets-sheet 2 Invenio E mi'h a Lui Dec. 18, 1928. 1,695,721

, D. F. SMITH y COMPRESSOR y Filed Aug. 27. 1927 ifs -sheets-smeet 5 e Q I In ventor:

Hayat `liat'ented -Dec. 18, 1928. i

DAVID FRANKLIN SMITH, F WASHINGTON, DISTRICT OF COLUMBIA.

coiurmisson.k

Application led August 27, 1927. Serial No. 215,971.l

The invention relates to compressors for household refrigerator plants in which it is desirable to employ a compressor which will run for an extended period of time without requiring lubrication orother attention and which will be devoid of parts liable to work loose and drop out of place and caus jamming of the driving connections and rupture of the casing with the resultant danger to the occupants of the house in which the compressor is installed.

In the drawings: Figure 1 is a central vertical sectional view of the invention.v

Fig. 2 is a .vertical sectional view at right angles to Fig. 1.

' Fig. 3 is a sectional view substantially in a plane cutting the main shaft and pinion `shaft centers.

Fig. f1 is a side view of the main casing. Fig. 5is a sectional view on line 5-'5 of Fig. 6 is a side view of one of the heads of the casing.

Fig'. 7 1s a sectional view on line 7-7 of Fin'. 6.

Fi 8 is an Fig.

Figs. 9, 10 and 11 are views of one of the heads of the casing.

In these drawings 1 indicates the main body of the casing in which the driving con- -elevation of right sidegof nection is housed, 2 the cylinder, of which there may be more than one, surmounting the main body of the casing to which it is se-f cured by flanges 'and bolts. The cylinder has a casing 3 at its upper end in which is housed the outlet valve 4, which is stressed by springs 5, .6. At'7 is an inlet portto which the pipe for the ammonia is connected to supply the cylinder abovey the piston 8. The piston has a wrist pin 9 to which is connected the piston Arod 10 extending from an eccentric strap 11 which surrounds the eccentric 12 formed in one piece with the shaft 13 which is mounted in lbearings 14, 15 of the heads 16,y 16, which are secured to the main body of the casing by flanges and bolts. yBetween the eccentric land itsV strap anti-friction means are located and in providing this means I have had in view the advantage to be derived from a construction `from which no parts will become loose, drop .ont ofplace and lodge between the eccentrlc strap and the casing where a jam may occur accompanied by rupture of the casing, escape of the ammonia and danger to the housel holder.

In carrying out this part of the invention I employ anti-friction rollers 17, carried in a cage made up of rings 18 between which therollers are held and in which the journal pins of the rollers are mounted. This cage with the rollers mounted therein forms one complete body, to be handled as one unit. This anti-friction body, together with the eccentric is slipped into the eccentric strap,

their" relative axial location being determined by a flange 11HL on the eccentric vstrap extending inwardly towards the axis of the said strap. The eccentric has a'flange or shoulder 12a whichconnes the anti-friction means between itself andthe flange 11, Each of these flanges are integral with the part which carries it so that there will be no possibility of nuts, bolts, or screws becoming loose and drooping out because none are employed as a means `for holding the flange to its carrying part,-y and-the cage itself with the rollers will beheld as one body by the flanges against displacement. The anti-friction rollers 'bear upon a lining 11b placed within theeccentric strap, and a lining 11 surrounds the eccentric, fits against the flange of the eccentric at one end and is confined by the flange ofthe strap at itsi other end.

The shaft 13 carries a gear 20 which is fixed thereon against a shoulder 21. The

gear is driven by a pinion 23 mounted on a the casing and to the hollow bearings 24* of said heads'in which the main shaft is journalled. These bearings are cut out interina diate of their length to receive the rings.

The bearing of the V1pinion shaft is lubricated by a. ring 28 depending into a body of oil in awell 30' of the main casing. This ring is located in a cut out 29a of the bearing 29 for the pinion shaft. This bearing 29 like the bearing 24 is formed integral with the head of the casing.

It will be noticed that the main casing is formed with a circular fiange 31, which is eccentric relative to the main body of the casing, `at the axial center of which latter the shaft 13 is located. This flange in dihead for each end o ameter, as seen in Fig.'4, includes within its l scope, or the plane of its circuit, the main space 32 within the casing and also the space 33, Fig. 4, which is offset in relation to the main space and which is adapted to receive theV bearing 29. By this construction the casing readily can be machined to receive the heads 16, 16a and these heads can be of circular form, facilitating their machining to fit the casing body.

It will be noticed that each head carries its own bearing and its own lubricant Well,v

the latter being formed by the partitions 34,'

which leave the open spaces at- 35, so that oil splashing up from the main'body of thev casing will be caught by these partitions and held in the pockets.

I claim 1. In combination in a compressor', a cylinder and iston, an eccentric drive for said iston, a sliaft on which the eccentric drive 1s mounted, a casing enclosing said drive and having detachable heads having split bear ings for said shaft, said heads yhaving' lubricant holding chambers, rings arranged in the s lit bearings and depending into the cham ers, a inion and gear connection for drivingthe s aft, a shaft carrying the -pinion, a bearing for the said shaft integral with one of the heads, said bearing having a recess and a ring in said recess, and depending into the easing to lubricate the said bearing, substantially as described.

2. `In combination the casing, a removal)1 t the casing, bearings on the heads, partitions on the heads forming oil pockets, an oil Well in the main easing and a supplemental shaft bearing in one of the heads ad'acent-said oil well, substantially as describe 3. In combination, a shaft having an eci centric, a supplemental shaft, gearing be-y tween the said shafts, a casing having a main portion and an 'oil'set portion forming a well adjacent said sup lemental shaft, a head lhaving a bearing or the eccentric carryinor shaft and a bearing for the main shaft, sai

casing and head having circular flanges eccentrically disposed relative to the main shaft and by which said head and casing are united, said cli-cular anges includmg within their pla-nes the offset bearing for the supplemental shaft, substantiall as described. 4. In combination, a casing, removable heads having bearings for a shaft and partitions extending rom said bearings to the Walls of the heads to brace said bearin s and serving also as walls of oil pockets, su stantially as described.

5. Apparatus according to claim 6 in which the partitions have spaces bet-Ween their upper edges and the Walls of the head so that oil splashing in the main body of the casing will be caught and held in said pockets, substantially as described.

, In testimony whereof, I aiiix my signature.

DAVID FRANKLIN SMITH. 

